DSN installed

I wrote some templates for Word97 under WinNT/2K which were connection to a
remote database using ADO through a system DSN installed on the machine. The
setup package I created was supposed to install also the DSN, so the easiest
way I could find was to go into the registry and export into a .reg file the
key containing the information about my DSN
(HKEY_LOCAL_MACHINE\Software\ODBC\ODBC.INI\MY_DSN). Running this .reg file
during set up, would insert all the necassary information in the registry,
and the code would work as well (even if the DSN cannot be found in Control
Panel>ODBC>DSN)

Now we moved to WinXP and the code is not working anymore: it failing in the
connection cos it cannot find the DSN!!!!

Any reason why? Any other solution? Any hint?

Thanks,
Gandalf